Divide-by-3 Injection-Locked Frequency Divider Using Two Linear Mixers

Sheng-Lyang JANG  Cheng-Chen LIU  Jhin-Fang HUANG  

IEICE TRANSACTIONS on Electronics   Vol.E93-C   No.1   pp.136-139
Publication Date: 2010/01/01
Online ISSN: 1745-1353
DOI: 10.1587/transele.E93.C.136
Print ISSN: 0916-8516
Type of Manuscript: BRIEF PAPER
Category: Electronic Circuits
CMOS,  VCO,  divide-by-3 injection-locked frequency divider,  wide locking range,  transformer,  

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This paper proposes a wide-locking range divide-by-3 injection-locked frequency divider (ILFD) fabricated in the 90 nm 1P9M CMOS technology. The divider consists of an nMOS cross-coupled LC oscillator and two injection MOSFETs in series with the cross-coupled nMOSFETs. The ILFD is formed with two linear mixers which share the same dc current so that a low power ILFD can be designed. At the supply voltage of 0.7 V, the free-running frequency is from 10.18 to 11.56 GHz, the current and power consumption of the divider without buffers are 2.8 mA and 1.96 mW, respectively. At the incident power of 0 dBm, the total operational locking range is 4.94 GHz, from the incident frequency 29.96 to 34.9 GHz.